FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data: www.schalltechnik-mm.de
Value from the PTB table, not verified
Büro f. Schalltechnik BBA Plus 120 foam absorber
BBA Plus 120
PTB reference data
Original description
Büro f. Schalltechnik BBA Plus 120 foam absorber
Material properties
Manufacturer: Büro f. Schalltechnik
Thickness: 120 mm, 240 mm
Backing: resonance absorber
Surface: open-cell flexible foam
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
1.00
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.85 | 1.00 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | |
|---|---|---|
| 120 mm | αw1.00 | |
| 240 mm | αw1.00 |
Weight / density: ca. 1 kg / Element (0,6 m²)
Dimensions: 1000 x 600 x 120 mm
Measured values as a table (2 measurements)
| Build-up | αw | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 120 mm · ca. 1 kg / Element (0,6 m²) · offenzellig | 1.00 | 0.20 | 0.40 | 0.49 | 0.62 | 0.84 | 1.06 | 1.16 | 1.12 | 1.09 | 1.07 | 1.03 | 1.04 | 1.00 | 1.01 | 0.99 | 1.02 | 0.98 | 0.95 |
| 240 mm · offenzellig | 1.00 | 0.74 | 0.91 | 1.33 | 1.25 | 1.15 | 1.10 | 1.05 | 1.08 | 1.05 | 1.06 | 1.07 | 1.09 | 1.07 | 1.10 | 1.08 | 1.07 | 1.05 | 1.08 |
Measured values as a table (2 measurements)
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